/Engine/Source/Editor/DataLayerEditor/Public/DataLayer/DataLayerEditorSubsystem.h
Sets a Parent DataLayer for a specified DataLayer
true if succeeded, false if failed.
bool SetParentDataLayer ( [UDataLayerInstance](API\Runtime\Engine\WorldPartition\DataLayer\UDataLayerInstance) * DataLayer, [UDataLayerInstance](API\Runtime\Engine\WorldPartition\DataLayer\UDataLayerInstance) * ParentDataLayer )